opkg update 总是失败

yyy***

在WinSCP的终端里执行opkg update总是失败，下面是执行后的情况。请教各位应该怎么弄，我刷了Openwrt，现在要安装图形化管理界面，这样没办法安装，有什么办法，谢谢。
/etc$ opkg update
Downloading http://downloads.openwrt.org/sna ... s/luci/Packages.gz.
Downloading http://downloads.openwrt.org/sna ... /luci/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading http://downloads.openwrt.org/att ... ckages/Packages.gz.
Updated list of available packages in /var/opkg-lists/attitude_adjustment.
Downloading http://downloads.openwrt.org/att ... kages/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading http://78.24.191.177:80/snapshot ... s/base/Packages.gz.
Updated list of available packages in /var/opkg-lists/designated_driver_base.
Downloading http://78.24.191.177:80/snapshot ... /base/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading http://78.24.191.177:80/snapshot ... kernel/Packages.gz.
Updated list of available packages in /var/opkg-lists/designated_driver_kernel.
Downloading http://78.24.191.177:80/snapshot ... ernel/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading http://78.24.191.177:80/snapshot ... s/luci/Packages.gz.
Downloading http://78.24.191.177:80/snapshot ... /luci/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading http://78.24.191.177:80/snapshot ... gement/Packages.gz.
Downloading http://78.24.191.177:80/snapshot ... ement/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading http://78.24.191.177:80/snapshot ... ckages/Packages.gz.
Downloading http://78.24.191.177:80/snapshot ... kages/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Downloading http://78.24.191.177:80/snapshot ... outing/Packages.gz.
Downloading http://78.24.191.177:80/snapshot ... uting/Packages.sig.
Signature check failed.
Remove wrong Signature file.
Collected errors:
* opkg_download: Failed to download http://downloads.openwrt.org/sna ... es/luci/Packages.gz, wget returned 4.
* opkg_download: Failed to download http://downloads.openwrt.org/att ... ckages/Packages.sig, wget returned 8.
* opkg_download: Failed to download http://78.24.191.177:80/snapshot ... s/base/Packages.sig, wget returned 8.
* opkg_download: Failed to download http://78.24.191.177:80/snapshot ... kernel/Packages.sig, wget returned 8.
* opkg_download: Failed to download http://78.24.191.177:80/snapshot ... es/luci/Packages.gz, wget returned 4.
* opkg_download: Failed to download http://78.24.191.177:80/snapshot ... s/luci/Packages.sig, wget returned 8.
* opkg_download: Failed to download http://78.24.191.177:80/snapshot ... agement/Packages.gz, wget returned 8.
* opkg_download: Failed to download http://78.24.191.177:80/snapshot ... gement/Packages.sig, wget returned 8.
* opkg_download: Failed to download http://78.24.191.177:80/snapshot ... ackages/Packages.gz, wget returned 4.
* opkg_download: Failed to download http://78.24.191.177:80/snapshot ... ckages/Packages.sig, wget returned 8.
* opkg_download: Failed to download http://78.24.191.177:80/snapshot ... routing/Packages.gz, wget returned 8.
* opkg_download: Failed to download http://78.24.191.177:80/snapshot ... outing/Packages.sig, wget returned 8.
* opkg_download: Failed to download http://78.24.191.177:80/snapshot ... ephony/Packages.sig, wget returned 8.
Downloading http://78.24.191.177:80/snapshot ... ephony/Packages.gz.
Updated list of available packages in /var/opkg-lists/designated_driver_telephony.
Downloading http://78.24.191.177:80/snapshot ... phony/Packages.sig.
Signature check failed.
Remove wrong Signature file.

guq***

换这个源
http://mirrors.ustc.edu.cn/openwrt

tmp***

这个源里面，有一个packages/packages，也是下载不了。校验有错误。

ilu***

vim /etc/opkg.conf 编辑这个文件

option check_signature 将这一行注释掉（就是在这一行前面加个#）
#option check_signature

就可以解决了